甲、 乙两人进行乒乓球比赛, 比赛打满2k(k ∈ N ∗ )局, 且每局甲获胜的概率和乙获胜的概率均为0.5.若某人获胜的局数大于k, 则此人赢得比赛. 下列

甲、 乙两人进行乒乓球比赛, 比赛打满2k(k ∈ N ∗ )局, 且每局甲获胜的概率和乙获胜的概率均为0.5.若某人获胜的局数大于k, 则此人赢得比赛. 下列说法正确的是( )

查看答案

The biggest challenge weall face is to prevent further environmental disasters.

The biggest challenge weall face is to prevent further environmental disasters. We ________ take act

查看答案

—________ you help me with my spoken English? —No problem.

—________ you help me with my spoken English? —No problem.

查看答案

高铁为居民出行提供了便利,从铁路沿线相距360km的甲地到乙地,乘坐高铁列车比乘坐普通列车少用3h.已知高铁列车的平均速度是普通列车平均速度的3倍,设普通列车的

高铁为居民出行提供了便利,从铁路沿线相距360km的甲地到乙地,乘坐高铁列车比乘坐普通列车少用3h.已知高铁列车的平均速度是普通列车平均速度的3倍,设普通列车的平均速度为x km/h,依题意,下面所列

查看答案

What a________ boy! Heworked out such a difficult math problem.

What a________ boy! Heworked out such a difficult math problem.

查看答案